Sheet-Shaped Heat Pipe for Thin Mobile Device Cooling
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Solution Overview
Problem
Existing heat dissipating solutions for mobile devices, such as smartphones and tablets, face challenges in achieving thinness while maintaining effective heat transport and additional functions like electromagnetic shielding and mechanical strength, due to thickness limitations of traditional heat pipes and heat dissipating plates.
Innovation Solution
A sheet-shaped heat pipe with a wick and working fluid sealed in a container formed by bonded metal sheets, allowing for a thickness of 0.5 mm or less, providing high design flexibility and additional functions beyond cooling, such as electromagnetic shielding and increased mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional heat pipes are used in heat dissipating plates, then heat transport ability is improved, but thickness increases making it difficult to achieve thin design requirements
Solution Approach 1:
The patent applies this principle by using a flattened heat pipe structure with thin wall thickness. The heat pipe is compressed in the thickness direction to create a flat configuration that maintains heat transport functionality while achieving the required thin profile for mobile devices. The wall thickness is specifically designed to be thin without compromising structural integrity or heat transfer performance.
2Length of stationary object
If the heat dissipating plate is thinned to meet design requirements, then thickness is reduced, but mechanical strength and electromagnetic shielding functions become insufficient
Solution Approach 1:
The patent applies this principle by creating a composite structure consisting of the heat dissipating plate, the flattened heat pipe, and bonding material. This composite assembly provides enhanced mechanical strength and electromagnetic shielding capabilities while maintaining a thin overall profile. The heat pipe itself acts as a structural reinforcement element within the thin plate configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sheet-shaped heat pipe enables efficient heat transport and multiple functional capabilities in thin form factors, suitable for small electronic devices, enhancing both cooling performance and structural integrity.
Implementation Method 1
a wick (3) sealed in the container (1), the wick (3) extending from an evaporation unit to a condensation unit... the wick (3) transports a working fluid (2) from a condensation region to an evaporation region
Implementation Method 2
the working fluid (2) evaporates by absorbing heat in the evaporation unit... the working fluid (2) in a liquid phase moves to the evaporation unit and evaporates
Implementation Method 3
the working fluid (2) in a gas phase moves to the condensation unit and condenses by dissipating the heat... the working fluid (2) in a gas phase moves to the condensation unit and condenses
Implementation Method 4
a sheet-shaped heat pipe includes a sheet-shaped container (1), a wick (3) sealed in the container (1), and a working fluid (2) sealed in the container (1)... the wick (3) transports a working fluid (2) from a condensation region to an evaporation region, the working fluid (2) evaporates by absorbing heat in the evaporation unit, the working fluid (2) in a gas phase moves to the condensation unit and condenses by dissipating the heat
Data Source
AI summary
A sheet-shaped heat pipe includes a sheet-shaped container, a wick sealed in the container, and a working fluid sealed in the container, the sheet-shaped container including a first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet being superposed in direct contact with each other at a peripheral edge portion, and the sheet-shaped container having a thickness of about 0.5 mm or less, and a thin heat dissipating plate that includes the sheet-shaped heat pipe.